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Integrated method for power divider with band-pass frequency response
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A technology of power divider and frequency response, which is applied in the direction of waveguide devices, circuits, connection devices, etc.
Inactive Publication Date: 2014-03-26
CHONGQING UNIV
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This type of optimization method has disadvantages such as long optimization time and not necessarily convergence in the specific implementation process; or the actual realization of the optimized power divider coupling matrix may be difficult.
For example, the diagonal array element of the coupling matrix of the obtained power divider is not 0, that is, the case of asynchronous tuning will greatly increase the 3D simulation time in the actual design process
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Embodiment 1
[0037] Where A is the admittance matrix of the filter network, a and b are the normalized input and output coupling values of the filter coupling network respectively, S 11 and S 21 are the scattering parameters for input return loss and insertion loss, respectively.
[0038] The admittance matrix A can be expressed as:
[0039] (2)
[0040] Among them, M is a coupling matrix of n*n; I is an identity matrix of n*n; R is a diagonal matrix with all zeros except the first and nth array elements, and ω is the normalized frequency.
[0041] The topology of a synchronously tuned filter consisting of n resonators without cross-coupling is given by figure 1 As shown, each black dot represents the resonator node, the straight line between the black dots represents the coupling between the resonators, and the input impedance of the Kth node looking to the right is Z in,k . The topology of the corresponding power divider is as follows figure 2 Shown: the first K resonators i...
Embodiment 2
[0065] 0 0.62 0 0.62 0 ;
[0066] 0 0 0.62 0 0.842 ;
[0067] 0 0 0 0.842 0 ;].
[0068] Implement column 3, such as Figure 14 given the adoption Figure 10 The algorithm flow described and Figure 13 The topology structure of the normalized frequency response of the power distribution of the two-way equal power distribution, and the corresponding normalized input and output coupling values a=b 1 =b 2 =1.06, the corresponding normalized coupling matrix is:
[0069] M=[0 0.842 0 0 0 0;
[0070] 0.842 0 0.62 0 0 0;
[0071] 0 0.62 0 0.62 0 0;
[0072] 0 0 0.62 0 0.595 0.595;
[0073] 0 0 0 0.595 0 0;
[0074] 0 0 0 0.595 0 0;].
[0075] Implement column 4, such as Figure 16 given the adoption Figure 10 The algorithm flow described and Figure 15 The topology of the three-way equal power distribution of the normalized frequency response of the power distribution, the corresponding normalized input and output coupling value a=b 1 =b 2 =b 3 =1.06, the ...
Embodiment 5
[0088] 0 0.62 0 0.62 0 0;
[0089] 0 0 0.62 0 0.69 0.488;
[0090] 0 0 0 0.69 0 0;
[0091] 0 0 0 0.488 0 0;].
[0092] Embodiment 6, such as Figure 20 given the adoption Figure 10 The algorithm flow described and Figure 19 The normalized frequency response of the two-way, power distribution with equal power distribution with cross-coupling nodes obtained from the topology of . The corresponding normalized input and output coupling values a=b 1 =b 2 =1.014, the corresponding normalized coupling matrix is:
[0093] M=[ 0 0.842 0 -0.1584 -0.1584;
[0094] 0.842 0 0.782 0 0;
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Abstract
The invention discloses an integrated method for a power divider with band-pass frequency response. The method comprises the following steps of: on the basis of the input port return loss and out-of-band suppression index for design of the power divider, integrating a corresponding normalized coupling matrix of a general Chebyshev filter; and according to the number of branches of the power divider and the power dividing ratio of each branch, by using an equivalent circuit principle, changing the coupling coefficients of the last common node of a network and a first node in each branch and the coupling coefficients of the branches including cross coupling to obtain the normalized coupling matrix of the power divider of this type, so that the aim of quickly integrating a band-pass type power divider is fulfilled. By adoption of the method, optimization of the normalized coupling matrix of the whole power divider is not required. The method is easy to implement and high in feasibility. The problem of non-convergence of the acquired normalized coupling matrix of the power divider by using an optimization algorithm or long computation time in the prior art can be solved.
Description
technical field [0001] The invention relates to a comprehensive method of a power divider that shares a common coupling resonator to realize a bandpass frequency response. It specifically involves using the generalized Chebyshev filter synthesis method to obtain the coupling matrix of the filter, and then obtaining the normalized coupling matrix of the power divider according to the circuit equivalent method of different power distribution ratios and different output channels of the power divider, Therefore, instead of using an optimization method to obtain the normalized coupling matrix of the band-pass power divider according to the design index of the power divider. It belongs to the technical field of microwave power dividers. Background technique [0002] Microwave power splitters are widely used in microwave communication, satellite communication, missile guidance, radar, electronic countermeasures, test instruments and other systems, mainly to distribute microwave p...
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